Copying-press



(No Model.) J. 'E. DONOVAN.

COPYING PRESS. N0. 3 95,1 22.

Patented Dec. 25, 1888.

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UNITED STATES PATENT OrrrcE,

JOHN E. DONOVAN, OF CINCINNATI, OHIO.

COPYING-PRESS.

SPECIFICATION forming part of Letters Patent No. 395,122, dated December 25, 1888.

Application filed October 16, 1886. Serial No. 216,385. (No model.)

To all whom it may concern.-

Be it known that I, JOHN E. Donovan, a citi zen of the United States, and a residentof Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Copying-Presses, of which the following is a specification.

My invention is an improved copyi rig-press.

The objects of the invention are to cheapen the construction, insure a rapid movement of the platen or upper plate, and providing a convenient means for holding the copying book while the manipulations necessary to the operation of copying are being performed. These objects are attained by the meanshercinafter described, and illustrated in the accompanyin g drawings, in which like parts are indicated by similar refercnee-letters when ever they occur throughout the various views.

Figure 1 is a longitudinal vertical section of a copying-press embodying my improvements, with the platen or upper plate in its lower position. Fl 2 is a detail view taken in the same sectional plane as Fig. I], showing the platen in its raised position.

shelf in plan view.

The bed-plate A consists of a l'rame stren gthened by longitudinal and transverse webs a and a. The end portions, (1 of. the frame A, which project inwardly unvard each other, have their edges concave to receive the rounded edges of the sliding bed-plate and shelf 1%, which is fitted to slide within. these concave edges and rest upon the webs a a, forming, when pushed in over the bed-plate, the bed upon which the copying-book. rests, and when drawn out forming a shell or table upon which the copying-book is placed while the leaf is dampened to receive the sheet to be copied. After the sheet is placed in the book, the book is placed in proper position upon the plate 1;) and the plate pushed back to position innlerncath the platen C. The interior longitudinal webs, a, are grooved at a to permit the pins 1), which pass through the plate B and project from the under side thereof, to pass through these grooves, the pins acting as stops to prevent the plate B from being 1s a transverse section taken through line .r :1: j

of Fig. 1, showing the bed-plate and sliding drawn entirely oft the bed-plate A, and also to stop it in the right position underneath the platen (1. The plate B may be of wood, if desired. The arched bridge D is cast in the usual form, and secured to the bedplate A by bolts E in the usual. manner. The actuating-screw F is east with a right and left hand thread upon its opposite ends, the opposite threads of the screw engaging in corresponding threads formed in the central portion. of the bridge D and the upwardly-projecting boss 0 of the platen (l. The upper end of the screw F is made square or angular to receive the hand-wheel G,which is held in place upon the end of the screw F by a headed screw, g, which is tapped into the end of the screw F. In the bridge D is formed a chamber, (Z, below the screw-threaded portion of the perforation, which receives the screw 1?, and a chamber, c,is also formed in the lower part of the boss 1., below the sorew-threadcd portion, so that there are but short screwt-hreadcd portions of the bridge and boss to engage the threads of the screw I3, thereby reducing the friction. The chamber (1 also pern'iits a portion of the opposirely-threaded lower end of the screw to pass up into the bridge, as seen in Fig. 2, thus enabling me to use a shorter screw and lower arch in the construction of the press, and the chamber 0' provides for conveniently tapping the boss or finishing the threads it formed in casting. The chamber calso pro vides an oil-reservoir for keeping the lower part of the screw properhv luln-icated, and prevents the oil running over on. the platen. To one edge of plate I is secured a lug or strap, 1), for the purpose of drawing the plate B out when it is to be used as a shelf for holding the copying-book.

It will be seen that by turning the screwby the hand-wheel G the platen will move with double the speed it would were the common screw having a single thread used; that there is but little tittingrequired to put it together after the castings are made.

I am aware that it is not broadly new to provide a copying-press with a sliding bookshelf.

lVhat I claim as new, and desire to secure by Letters Patent, is

In a copying-press, the combination of the the right and left screw F,- snhstantially as bed-p1ate,'the yoke D, secured thereto and specified.

having a central threaded perforation and T T T enlarged chamber below the threaded por- JOH) DOB tion, the platen 0, having upwardly-project- Witnesses:

ing perforated boss (1, threaded in the oppo- GEO. J. MURRAY,

site direction from the thread in the yoke. and T. J. BEREUS. 

